Jump to Recipe Print RecipeThere’s nothing quite like the moment a bubbling dish of Potatoes Au Gratin emerges from the oven, golden and inviting. Trust me, the rich aroma of melting cheese swirled with sautéed onions and garlic is enough to make anyone’s heart skip a beat! This classic French comfort food, layered with silky slices of russet or Yukon gold potatoes, is not just delectable; it’s incredibly versatile. Whether you’re looking to impress guests or simply indulge in some homemade goodness, this recipe offers both a warm embrace and an opportunity to get creative—swap in your favorite cheese or add a hint of smoky bacon for a delightful twist. Plus, the ease of preparation makes it perfect for even the busiest of weeks. Curious about how to whip up this dreamy dish that feels like a hug on a plate? Let’s dive into the recipe! Why Will You Love Potatoes Gratin? Comforting Indulgence: Dive into a creamy, cheesy world where each bite feels like a warm hug, perfect for family gatherings or cozy nights in. Endless Customization: Mix and match cheeses, from Gruyere to cheddar, or sprinkle crispy bacon bits for added flavor. You could even play around with variations like Cheesy Ranch Potatoes or Baked Smashed Potatoes for a unique twist. Simple Preparation: With straightforward steps and minimal fuss, you can create a gourmet dish effortlessly. Flavor Explosion: The combination of sautéed onions, garlic, and thyme transforms humble potatoes into a mouthwatering side that will steal the show. Perfect for Any Occasion: Whether it’s a weeknight dinner or a festive celebration, this dish is a guaranteed crowd-pleaser. Potatoes Gratin Ingredients For the Base • Butter – Adds richness and aids in the preparation of the creamy sauce. • Onion – Provides aromatic flavor; shallots can be used for a milder taste. • Garlic – Brings depth to the dish; can be omitted for a simpler taste. • Thyme – Adds herbal notes; dried thyme works well if fresh isn’t available. • Flour – Essential for thickening the sauce; gluten-free flour is a great substitute. • Milk (or Heavy Cream) – Forms the creamy base of the cheese sauce; heavy cream enhances richness. For the Cheese Layer • Gruyere Cheese – Known for its nutty flavor and excellent meltability; cheddar or mozzarella are tasty alternatives. • Nutmeg – An optional spice that enhances creaminess; can be skipped if desired. For Seasoning • Salt & Pepper – Simple essentials to boost the flavors of the dish. For the Core • Potatoes – The star ingredient; russet or Yukon gold potatoes are highly recommended for the best results. This Potatoes Gratin is a warm hug in every bite, waiting to become a staple at your dining table! Step‑by‑Step Instructions for Potatoes Gratin Step 1: Sauté Aromatics Begin by melting 2 tablespoons of butter in a medium saucepan over medium heat. Once melted and bubbling, add 1 finely diced onion, cooking until it becomes transparent and tender, about 5 minutes. Stir in 2 minced garlic cloves and a teaspoon of fresh thyme leaves, allowing them to cook until fragrant, roughly 1 minute. Step 2: Make Sauce Sprinkle 2 tablespoons of flour into the onion mixture, whisking constantly for about 1-2 minutes until lightly golden, creating a roux. Gradually pour in 2 cups of milk while stirring continuously until the mixture thickens, approximately 5-7 minutes. Lower the heat and incorporate 2 cups of shredded Gruyere cheese, stirring until fully melted and smooth. Season with a pinch of nutmeg, salt, and pepper to taste. Step 3: Layer Potatoes Prepare a large baking dish by greasing it lightly with butter. Pour a thin layer of the cheese sauce at the bottom, just enough to cover the surface. Arrange half of the thinly sliced russet or Yukon gold potatoes in an even layer, overlapping slightly. Pour a portion of the cheese sauce over the potatoes, ensuring even coverage, and repeat with the remaining potatoes and sauce. Step 4: Top and Bake Preheat your oven to 350°F (180°C). Once layered, pour the remaining cheese sauce over the top layer of potatoes, ensuring every slice is coated. For an extra cheesy finish, sprinkle a generous amount of shredded cheese atop. Bake in the preheated oven for 45-60 minutes, or until the potatoes are tender and the top is golden and bubbly, with a delightful aroma wafting through your kitchen. Step 5: Rest and Serve After baking, remove the dish from the oven and let it rest for about 10-15 minutes. This resting time allows the sauce to thicken and makes slicing easier. Once set, cut into portions and serve warm, letting the creamy potato gratin be the star of your meal, perfect for any occasion! How to Store and Freeze Potatoes Gratin Fridge: Store any leftover Potatoes Gratin in an airtight container, where it will keep well for up to 3 days. Freezer: If freezing, wrap individual portions in plastic wrap and place them in a freezer-safe bag. They can be stored for up to 2 months. Reheating: To reheat, thaw in the fridge overnight and warm in a preheated oven at 350°F (180°C) until heated through, about 20-30 minutes. Make-Ahead Tip: You can assemble your Potatoes Gratin in advance and refrigerate it before baking. Just add 10-15 minutes to the baking time if starting from the fridge. What to Serve with Potatoes Au Gratin Elevate your dining experience by pairing these creamy delights with complementary dishes that will warm your soul and tantalize your taste buds. Roasted Chicken: Juicy, herb-seasoned chicken perfectly balances the richness of the au gratin, adding a savory element that feels like home. Garlicky Green Beans: Crisp-tender green beans sautéed in garlic provide a refreshing contrast, enhancing the dish’s comforting, creamy qualities. Herbed Salad: A light salad with mixed greens and a zesty vinaigrette offers a bright, fresh counterpoint to the heaviness of the potatoes, keeping your meal balanced. Braised Short Ribs: Melt-in-your-mouth tender short ribs add a rich, meaty depth. The luscious sauce pairs beautifully with the creamy texture of the gratin. Crusty Baguette: Fresh, crusty bread is perfect for mopping up every last bit of cheese sauce, adding an inviting texture to your dining experience. Sparkling White Wine: Bright, citrusy notes from a chilled sparkling wine refresh the palate and enhance the overall festivity of your meal. Chocolate Mousse: For dessert, a light and airy chocolate mousse provides a delightful sweet finish, contrasting nicely with the savory gratin and rounding out your dining adventure. Potatoes Gratin Variations & Substitutions You have the opportunity to make this delightful dish your own! Each variation introduces a new twist, inviting you to customize and explore the comforting world of Potatoes Gratin. Cheese Bonanza: Add a blend of cheeses like cheddar, mozzarella, or even aged gouda for a rich, multi-layered flavor. Bacon Lovers: Incorporate crispy bacon bits between the potato layers for a deliciously savory touch that complements the creaminess perfectly. Vegetarian Delight: Swap out butter for olive oil and add sautéed mushrooms or spinach to create a veggie-packed rendition that still hits all the comforting notes. Spicy Kick: Sprinkle in some red pepper flakes or chopped jalapeños for a subtle heat that elevates the dish; it’s a fabulous way to awaken the flavors! Herb Infusion: Mix in fresh herbs like rosemary or parsley along with thyme for an aromatic flavor explosion that brightens the gratin. Nutty Twist: Consider adding a layer of crushed nuts, such as pecans or walnuts, for a delightful crunch that contrasts beautifully with the creamy texture. Dairy-Free Option: For a vegan version, use cashew cream and nutritional yeast instead of cheese, while ensuring your milk is plant-based for that rich, creamy essence. In case you’re feeling adventurous, check out these delicious spin-offs: Try out the Cheesy Taco Potatoes for an exciting twist or dive into the comforting layers of Baked Potatoes New for a fun side dish. Each variation invites you to unleash your creativity in the kitchen! Expert Tips for Potatoes Gratin Slice Evenly: Use a mandoline slicer for uniform potato thickness, ensuring that all slices cook evenly for a perfectly creamy texture. Choose the Right Cheese: While Gruyere is traditional, feel free to experiment! Mixing cheeses like cheddar or mozzarella can enhance the flavor of your Potatoes Gratin. Sauce Consistency: Be cautious with flour amounts if using heavy cream; too much can make the sauce overly thick. Adjust as needed for the perfect creaminess. Baking Dish Size: The depth of your baking dish can affect cooking time. A shallow dish usually requires less time than a deeper one, so keep an eye on your gratin! Let Rest: After baking, give your Potatoes Gratin a 10-15 minute rest. This helps the sauce set up for easier slicing and serving. Make Ahead Options These Creamy Potatoes Gratin are a fantastic choice for meal prep! You can assemble the entire dish up to 24 hours in advance by layering the sliced potatoes and cheese sauce, then cover tightly with plastic wrap to keep it fresh. If you’re looking to prepare ahead for even longer, the uncooked gratin can be refrigerated for up to 3 days. To maintain quality, avoid pouring the sauce over the top layer until you’re ready to bake; this prevents sogginess. When you’re ready to serve, simply uncover and bake in the preheated oven for about 45-60 minutes until golden and bubbly, ensuring a comforting meal that’s just as delicious as if freshly made! Potatoes Au Gratin Recipe FAQs What kind of potatoes are best for this recipe? For Potatoes Au Gratin, russet or Yukon gold potatoes are ideal due to their starchy and waxy nature, respectively. They create a creamy interior and hold their shape well. Look for firm potatoes without dark spots or blemishes for the best results. How should I store leftover Potatoes Au Gratin? Store any leftovers in an airtight container in the refrigerator for up to 3 days. If you have a lot left, consider portioning them out for quicker meals later on! Just reheat in the oven for the best texture. Can I freeze Potatoes Au Gratin? Absolutely! To freeze, wrap individual portions tightly in plastic wrap and then place them in a freezer-safe bag. They’ll keep well for up to 2 months. When you’re ready to enjoy, simply thaw in the fridge overnight and reheat in a preheated oven at 350°F (180°C) until heated through, around 20-30 minutes. What if my sauce is too thick? If your cheese sauce turns out too thick, simply whisk in a little more milk or cream over low heat until it reaches the desired consistency. Remember, a creamy sauce is key to a successful gratin! If you’re using heavy cream, reduce the flour used in the sauce to avoid thickness. Is this dish gluten-free? To make Potatoes Au Gratin gluten-free, substitute the all-purpose flour with a gluten-free flour blend in the sauce. This will keep the creamy goodness while accommodating dietary needs. It’s a simple swap that makes all the difference! Can I add any other ingredients? Of course! I love adding crispy bacon bits for an extra depth of flavor. You can also experiment by tossing in sautéed vegetables like leeks or mushrooms, or mixing in different cheeses like mozzarella or sharp cheddar for a twist on the classic. The more the merrier! Creamy Potatoes Gratin: Comfort Food for Every Occasion This creamy Potatoes Gratin is a rich, versatile dish that warms the heart and pleases any crowd. Print Recipe Pin Recipe Prep Time 15 minutes minsCook Time 1 hour hrResting Time 15 minutes minsTotal Time 1 hour hr 15 minutes mins Servings: 6 servingsCourse: DinnerCuisine: FrenchCalories: 350 Ingredients Equipment Method Nutrition Notes Ingredients 1x2x3x? For the Base2 tablespoons Butter Adds richness and aids in the preparation of the creamy sauce.1 Onion Provides aromatic flavor; shallots can be used for a milder taste.2 cloves Garlic Brings depth to the dish; can be omitted for a simpler taste.1 teaspoon Thyme Adds herbal notes; dried thyme works well if fresh isn't available.2 tablespoons Flour Essential for thickening the sauce; gluten-free flour is a great substitute.2 cups Milk Forms the creamy base of the cheese sauce; heavy cream enhances richness.For the Cheese Layer2 cups Gruyere Cheese Known for its nutty flavor and excellent meltability; cheddar or mozzarella are tasty alternatives.1 pinch Nutmeg An optional spice that enhances creaminess; can be skipped if desired.For Seasoningto taste Salt Simple essentials to boost the flavors of the dish.to taste Pepper Simple essentials to boost the flavors of the dish.For the Core4 cups Potatoes The star ingredient; russet or Yukon gold potatoes are highly recommended for the best results. Equipment Medium SaucepanMandoline slicerlarge baking dish Method Step-by-Step Instructions for Potatoes GratinBegin by melting 2 tablespoons of butter in a medium saucepan over medium heat. Once melted and bubbling, add 1 finely diced onion, cooking until it becomes transparent and tender, about 5 minutes. Stir in 2 minced garlic cloves and a teaspoon of fresh thyme leaves, allowing them to cook until fragrant, roughly 1 minute.Sprinkle 2 tablespoons of flour into the onion mixture, whisking constantly for about 1-2 minutes until lightly golden, creating a roux. Gradually pour in 2 cups of milk while stirring continuously until the mixture thickens, approximately 5-7 minutes. Lower the heat and incorporate 2 cups of shredded Gruyere cheese, stirring until fully melted and smooth. Season with a pinch of nutmeg, salt, and pepper to taste.Prepare a large baking dish by greasing it lightly with butter. Pour a thin layer of the cheese sauce at the bottom, just enough to cover the surface. Arrange half of the thinly sliced russet or Yukon gold potatoes in an even layer, overlapping slightly. Pour a portion of the cheese sauce over the potatoes, ensuring even coverage, and repeat with the remaining potatoes and sauce.Preheat your oven to 350°F (180°C). Once layered, pour the remaining cheese sauce over the top layer of potatoes, ensuring every slice is coated. For an extra cheesy finish, sprinkle a generous amount of shredded cheese atop. Bake in the preheated oven for 45-60 minutes, or until the potatoes are tender and the top is golden and bubbly.After baking, remove the dish from the oven and let it rest for about 10-15 minutes. This resting time allows the sauce to thicken and makes slicing easier. Once set, cut into portions and serve warm. Nutrition Serving: 1cupCalories: 350kcalCarbohydrates: 45gProtein: 10gFat: 15gSaturated Fat: 9gPolyunsaturated Fat: 1gMonounsaturated Fat: 5gCholesterol: 40mgSodium: 500mgPotassium: 600mgFiber: 4gSugar: 2gVitamin A: 300IUVitamin C: 30mgCalcium: 250mgIron: 2mg NotesSlice evenly for uniform potato thickness. Feel free to experiment with different cheeses for flavor enhancement. Let rest for 10-15 minutes after baking for best results. Tried this recipe?Let us know how it was!